Corel Painter Help | Dab Stencil controls

Dab Stencil controls

To apply a dab stencil to a brush variant

To adjust the properties of a dab stencil

Dab Stencil masks brush dabs before you apply a brushstroke, letting you add control and creative touch to a wide range of brushes — from blending brushes, to Watercolor and Impasto. Applying a dab stencil knocks out areas of the brush dab by making them more transparent. It is as if the brush dab becomes a stamp that has elevated and indented areas. The brush applies more paint with the elevated areas of the dab, and less or no paint at all with the indented areas.

You can choose a dab stencil source from a variety of stencil media such as paper, flow maps, and textures.

The brushstrokes in this artwork use the Dab Stencil feature. Artwork by Melissa Gallo.

From left to right: Using paper, flow map, and texture as a dab stencil source

You can adjust the properties of the dab stencil to change the look of the brushstrokes. For example, you can use the Strength and Min Strength controls to adjust the maximum and minimum opacity of the dab stencil. When the dab stencil is at maximum strength (100%), it is the most opaque and makes the dab areas that it covers the most transparent. In addition, you can apply jitter to vary the opacity of the dab stencil, and you can smooth the jitter for more natural-looking brushstrokes. You can link a dab stencil to an expression so that dab stencil opacity changes in response to specific mouse or stylus movement, such as pressure, direction or velocity.

Strength settings from left to right: Maximum, medium, and low values. At maximum strength, the dab areas knocked out by the stencil stand out best; at low strength, the knocked out areas almost blend with the other areas.

The strength of the dab stencil is at 100% in all three brushstrokes, but the minimum strength varies from 0 to 87%. Higher minimum settings result in a dab stencil with higher minimum opacity that produces a more distinct brush stamp (right).

From left to right: Dab stencil brushstrokes without jitter, with jitter, and with jitter and smoothness

You can also link a dab stencil to audio input from your microphone, or internal audio such as streaming music. The opacity (strength) of the dab stencil varies in synch with the changes of the audio signal.

The Dab Stencil feature differs from grain in several ways. Dab stencils vary the opacity of the dab before you apply a brushstroke and can be applied only to dab-based brushes. While grain works only with paper textures, dab stencils can use flow maps and other textures as well. Also, dab stencils work with methods and subcategories that currently do not support grain. For example, you can apply a dab stencil to a glow brush.

Applying the same paper texture by using Grain (left) and applying a dab stencil (right)

Glow brushes work well with the Dab Stencil feature to create interesting texture and lighting effects. From left to right: A paper, texture, and a flow map are used as dab stencil sources.

You can use the Dab Stencil feature together with texture brushes to create impactful and controlled brushstrokes. For more information about texture brushes, see Texture painting.

Texture brushes and dab stencil brushes are used together with the shown texture and other paper textures to create the sphere surface on the right.

Dab Stencil can also be combined with Impasto brushes to add a realistic, three-dimensional look and feel to an image.

Combining Impasto with Dab Stencil

For a list of sample Dab Stencil brushstrokes, see Dab Stencils.

To apply a dab stencil to a brush variant

1 Choose a dab-based brush variant from the Brush Selector.

Dab Stencil works well with brushes that use any of the following dab types: Captured, Dynamic Speckles, Circular, Computed Circular, and Static Bristle.

2 On the extended property bar, open the Dab Options flyout

, and enable the Apply Dab Stencil check box.

If the extended property bar isn’t open, choose Window

Extended Property Bar.

3 Adjust any properties you want. For more information, see To adjust the properties of a dab stencil.

You can also apply a dab stencil from the Dab Stencil panel (Window Brush Control Panels Brush Shape Dab Stencil).

To adjust the properties of a dab stencil

1 Choose a Dab Stencil brush variant or a brush variant that supports Dab Stencil.

2 Choose Window

Brush Control Panels

Brush Shape

Dab Stencil.

3 Make sure the Apply Dab Stencil check box is enabled.

4 From the Source list box, choose one of the following options:

• Flow Map — to use a flow map as the stencil source

• Paper — to use a paper texture as the stencil source

• Texture — to use a texture as the stencil source. If you want to display a preview of the texture in the image window, enable the Show Texture check box.

5 Click the selector button next to the Source list box, and choose the flow map, paper texture, or texture you want to use as a source.

To edit the source, click the Toggle [Source Name] Panel button, and adjust any attributes you want on the corresponding panel. For more information about editing the dab stencil source, see To customize a flow map, Working with paper texture and grain or Customizing Texture brushes.

6 To adjust the Dab Stencil properties, perform a task from the following table.

To	Do the following
Specify the maximum level of opacity that the stencil applies to the dab	Move the Strength slider.
Specify the minimum level of opacity that the stencil applies to the dab	Move the Min Strength slider.
Set the range of opacity variability of the dab stencil based on the maximum and minimum strength settings	Move the Strength Jitter slider.
Smooth the jitter of opacity variability of the dab stencil	Click the Smoothness slider.
Link Dab Stencil to an expression	From the Expression list box, choose an expression.
Link Dab Stencil to audio	Click the Audio Expression button . To choose an audio input and adjust audio settings, choose Window Audio Expression Audio Settings Panel. For more information, see Audio Expression.
Adjust the angle of the Direction expression	Move the Direction slider.
Reverse the effect of an Expression setting	Click the Invert button .